]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * | |
3 | * SNMP MIB entries for the IP subsystem. | |
4 | * | |
5 | * Alan Cox <gw4pts@gw4pts.ampr.org> | |
6 | * | |
7 | * We don't chose to implement SNMP in the kernel (this would | |
8 | * be silly as SNMP is a pain in the backside in places). We do | |
9 | * however need to collect the MIB statistics and export them | |
10 | * out of /proc (eventually) | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
1da177e4 LT |
17 | */ |
18 | ||
19 | #ifndef _SNMP_H | |
20 | #define _SNMP_H | |
21 | ||
22 | #include <linux/cache.h> | |
23 | #include <linux/snmp.h> | |
d647b36a | 24 | #include <linux/smp.h> |
1da177e4 LT |
25 | |
26 | /* | |
27 | * Mibs are stored in array of unsigned long. | |
28 | */ | |
29 | /* | |
30 | * struct snmp_mib{} | |
31 | * - list of entries for particular API (such as /proc/net/snmp) | |
32 | * - name of entries. | |
33 | */ | |
34 | struct snmp_mib { | |
5833929c | 35 | const char *name; |
1da177e4 LT |
36 | int entry; |
37 | }; | |
38 | ||
39 | #define SNMP_MIB_ITEM(_name,_entry) { \ | |
40 | .name = _name, \ | |
41 | .entry = _entry, \ | |
42 | } | |
43 | ||
44 | #define SNMP_MIB_SENTINEL { \ | |
45 | .name = NULL, \ | |
46 | .entry = 0, \ | |
47 | } | |
48 | ||
49 | /* | |
50 | * We use all unsigned longs. Linux will soon be so reliable that even | |
51 | * these will rapidly get too small 8-). Seriously consider the IpInReceives | |
52 | * count on the 20Gb/s + networks people expect in a few years time! | |
53 | */ | |
54 | ||
1da177e4 LT |
55 | /* IPstats */ |
56 | #define IPSTATS_MIB_MAX __IPSTATS_MIB_MAX | |
57 | struct ipstats_mib { | |
58 | unsigned long mibs[IPSTATS_MIB_MAX]; | |
ec733b15 | 59 | }; |
1da177e4 LT |
60 | |
61 | /* ICMP */ | |
62 | #define ICMP_MIB_DUMMY __ICMP_MIB_MAX | |
63 | #define ICMP_MIB_MAX (__ICMP_MIB_MAX + 1) | |
64 | ||
65 | struct icmp_mib { | |
66 | unsigned long mibs[ICMP_MIB_MAX]; | |
ec733b15 | 67 | }; |
1da177e4 | 68 | |
96793b48 DS |
69 | #define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAX |
70 | struct icmpmsg_mib { | |
71 | unsigned long mibs[ICMPMSG_MIB_MAX]; | |
ec733b15 | 72 | }; |
96793b48 | 73 | |
1da177e4 LT |
74 | /* ICMP6 (IPv6-ICMP) */ |
75 | #define ICMP6_MIB_MAX __ICMP6_MIB_MAX | |
76 | struct icmpv6_mib { | |
77 | unsigned long mibs[ICMP6_MIB_MAX]; | |
ec733b15 | 78 | }; |
1da177e4 | 79 | |
14878f75 DS |
80 | #define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX |
81 | struct icmpv6msg_mib { | |
82 | unsigned long mibs[ICMP6MSG_MIB_MAX]; | |
ec733b15 | 83 | }; |
14878f75 DS |
84 | |
85 | ||
1da177e4 LT |
86 | /* TCP */ |
87 | #define TCP_MIB_MAX __TCP_MIB_MAX | |
88 | struct tcp_mib { | |
89 | unsigned long mibs[TCP_MIB_MAX]; | |
ec733b15 | 90 | }; |
1da177e4 LT |
91 | |
92 | /* UDP */ | |
93 | #define UDP_MIB_MAX __UDP_MIB_MAX | |
94 | struct udp_mib { | |
95 | unsigned long mibs[UDP_MIB_MAX]; | |
ec733b15 | 96 | }; |
1da177e4 | 97 | |
1da177e4 LT |
98 | /* Linux */ |
99 | #define LINUX_MIB_MAX __LINUX_MIB_MAX | |
100 | struct linux_mib { | |
101 | unsigned long mibs[LINUX_MIB_MAX]; | |
102 | }; | |
103 | ||
558f82ef MN |
104 | /* Linux Xfrm */ |
105 | #define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAX | |
106 | struct linux_xfrm_mib { | |
107 | unsigned long mibs[LINUX_MIB_XFRMMAX]; | |
108 | }; | |
1da177e4 LT |
109 | |
110 | /* | |
111 | * FIXME: On x86 and some other CPUs the split into user and softirq parts | |
112 | * is not needed because addl $1,memory is atomic against interrupts (but | |
113 | * atomic_inc would be overkill because of the lock cycles). Wants new | |
114 | * nonlocked_atomic_inc() primitives -AK | |
115 | */ | |
116 | #define DEFINE_SNMP_STAT(type, name) \ | |
7d720c3e | 117 | __typeof__(type) __percpu *name[2] |
1da177e4 | 118 | #define DECLARE_SNMP_STAT(type, name) \ |
7d720c3e | 119 | extern __typeof__(type) __percpu *name[2] |
1da177e4 LT |
120 | |
121 | #define SNMP_STAT_BHPTR(name) (name[0]) | |
122 | #define SNMP_STAT_USRPTR(name) (name[1]) | |
123 | ||
4eb41d10 CL |
124 | #define SNMP_INC_STATS_BH(mib, field) \ |
125 | __this_cpu_inc(mib[0]->mibs[field]) | |
126 | #define SNMP_INC_STATS_USER(mib, field) \ | |
127 | this_cpu_inc(mib[1]->mibs[field]) | |
128 | #define SNMP_INC_STATS(mib, field) \ | |
129 | this_cpu_inc(mib[!in_softirq()]->mibs[field]) | |
130 | #define SNMP_DEC_STATS(mib, field) \ | |
131 | this_cpu_dec(mib[!in_softirq()]->mibs[field]) | |
132 | #define SNMP_ADD_STATS_BH(mib, field, addend) \ | |
133 | __this_cpu_add(mib[0]->mibs[field], addend) | |
134 | #define SNMP_ADD_STATS_USER(mib, field, addend) \ | |
135 | this_cpu_add(mib[1]->mibs[field], addend) | |
aa2ea058 TH |
136 | #define SNMP_ADD_STATS(mib, field, addend) \ |
137 | this_cpu_add(mib[0]->mibs[field], addend) | |
7d720c3e TH |
138 | /* |
139 | * Use "__typeof__(*mib[0]) *ptr" instead of "__typeof__(mib[0]) ptr" | |
140 | * to make @ptr a non-percpu pointer. | |
141 | */ | |
edf391ff NH |
142 | #define SNMP_UPD_PO_STATS(mib, basefield, addend) \ |
143 | do { \ | |
7d720c3e | 144 | __typeof__(*mib[0]) *ptr; \ |
4eb41d10 CL |
145 | preempt_disable(); \ |
146 | ptr = this_cpu_ptr((mib)[!in_softirq()]); \ | |
edf391ff NH |
147 | ptr->mibs[basefield##PKTS]++; \ |
148 | ptr->mibs[basefield##OCTETS] += addend;\ | |
4eb41d10 | 149 | preempt_enable(); \ |
edf391ff NH |
150 | } while (0) |
151 | #define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \ | |
152 | do { \ | |
7d720c3e | 153 | __typeof__(*mib[0]) *ptr = \ |
4eb41d10 | 154 | __this_cpu_ptr((mib)[!in_softirq()]); \ |
edf391ff NH |
155 | ptr->mibs[basefield##PKTS]++; \ |
156 | ptr->mibs[basefield##OCTETS] += addend;\ | |
157 | } while (0) | |
1da177e4 | 158 | #endif |